I have some general questions regarding ADAR100 EVALZ:
1. There is a J1 and J2 connector on the board. But there is no description about this connection in the data sheet...
In the data sheet there is only J5 described....and this line is not on the board..
2. Is the Technology of ADAR a CW or pulsed signal?
3. Is it possible to use TX/RX at the same time? Or do you have to use only TX for example and terminate the RX channels? In this case I can use a horn antenna for a RX...
I would be very glad, if you can answer these questions.
Thanks in Advance...
Answers to your questions:
1. Evaluation board schematic is in the User Guide, available on the product webpage - also attached below. J1 and J2 are SMA connectors for the calibration path. Do you mean P1 and P2? Those contain various GPIO and SPI connections.
2. I don't know if I understand the question. Do you mean can you use a pulse or CW signal with the ADAR1000? If so, you can use either, just as long as you do not go beyond the absolute maximum ratings in the datasheet.
3. You cannot be in Tx mode and Rx mode at the same time; you can either be in Tx mode or Rx mode - you have to switch back and forth. Unused channels should be loaded with 50 Ohms.
thanks very much, you´ve answered all my questions.
Regarding the first question: No I don´t mean P1 and P2. I mean J1 and J2...could you give an example what you mean with calibration path? I thought only the Channel RF_IO is for the network analyzer....
did I understand it right?.....there are two possibilities to set the phase or gain.
1. I am using the GUI and follow the steps up on page 8
2. If I want to save some time, I can use the manual register and upload the txt files for gain settings
maybe you can tell me the values for I and Q for aiming a phase of 60,90,180 degrees....because it didn´t work with my values
sorry, that I am spaming you...I followed all the steps in the datasheet and connecter the Networkanalyzer to the RF IO and TX1... there is only a noise seeable....no signal of the phase with 45 degrees....Can you help me?
thank you very much....actually I have a power supply with +3.3V and -5V... you can have a look at the
picture. I also have uploaded the file for manual register write....but there is always just noise seeable. Of course I have referred to the sections you have mentioned...
Can you measure the current on the 3.3V supply? This will indicate if the part is biased up correctly or not.
If you run any of those max gain settings files, the part should be biased up correctly, in max gain and 45 deg phase.
Also, with the measurement you are attempting, make sure you use the Tx max gain file : "TX1_MaxG_45.txt"
Hi, I dont know why, but today the problem was solved....Now I dont see any noise...
I have another question now....I dont know the difference between TX Control and TX Registes, because there are all the same settings....when do you use TX Control and when TX Registes?
The problem is also, that if I write some values at TX1 and click on TX load, I get a failure...and sometimes the ADAR Software is closing rapidly...
Do you use the TX Control and TX Register at the same time? Because in the description step by step, there was´nt any information about it....
Another question: the Network analyzer shows only a signal, if I upload the referred txt file. But if I do the settings via GUI without a txt file, it just show me some noise...
I dont know if its a software bug..
Tx Control & Rx Control tabs do a lot calculations and writes that the user isn't necessarily away of (the logging window at the bottom of the GUI shows exactly what writes are done). It is a convenience, but they are not what you want to use when trying to learn the part.
You don't really want to use Tx Control and Tx Register tabs at the same time.
Concerning the bug in the software, did you click the Initialize button?
There is a bug with the control of the BEAM_RAM_BYPASS bit in the GUI. Right now, I am recommending writing 0x3860 using the Manual Register Write tab, to bypass the RAM for the beam & bias data.
I get always this following failure, if I click on TX load
you can not upload more than one file via manual register write, right?
I only got a signal via manual register write....but there is only one file possible, so I can not do a phase shift